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(No'ModeL) W. S. JOHNSON.

v TEMPERATURE REGULATOR. No. 352,057. Patented NOV. 2, 1886.

N. PETERS, PbmoI-flhognphen Wnhinglcn. D, C.

'lJNITED STATES PATENT OFFICE.

:WAEEEN s. JOHNSON, OF MILWAUKEE, WISCONSIN, ASSIGNOB TO THE JOHNSONELECTRIC SERVICE COMPANY, OF sAME PLACE.

Application filed May 18, 1886.

To all whom it may concern:

Be it known that I, WARREN S. J onNsoN, of Milwaukee, in the county'ofMilwaukee, and in the State of Wisconsin, have invented certain new anduseful Improvements in Temperature-Regulators; and I do hereby declarethat the following is a full,c1ear, and exact description thereof.

My invention relates to devices for regulating temperature, havingespecial reference to hot-air furnaces; and it consists in certaincombinations of devices and the peculiarities of their construction, allas will'be fully set forth hereinafter.

In the drawings, Figure 1 is a general view illustrating my inventionapplied to a-hot-air furnace, and Figs. 2 and3 are details of certainparts in exactly the opposite working position from that show ninFig. 1. I

A represents an apartment which receives its heat through a register, a,from a furnace, B. In said apartment a thermostat, O, is 10- cated,connected by wire I) to a battery, D, and by wire 0 to one of thebinding-postsof'an electro-pneumatic valve, H, from whose otherbinding-post another wire, d, connects with the said battery D. Thisvalve H is identical in its construction and operation with thesimilarly lettered electrically-actuated auxiliary valve shown anddescribed in my Patent No. 331,406, dated December 1,1885. In Fig.v

3 I show-a detail sectional view of this valve, which consists of achamber, H, containin'g'a piston-valve, H, which is lifted by thear'maetare-lever h when the electric circuit is made by the thermostat, andthis permits the fluid under pressure (as compressed air) from thereservoir G to enter the valve-chamber H from the pipe F through thepassage h,and to pass out of said chamber through the passage h into thepipe F on the other side of the valve H, and thus into the expansiblechamber E and beyond, as hereinafter explained, and the saidvalve-chamber H has an outlet, h, at the top, which is closed by theupper end of the piston-valve H when the passages 71. H h are open, asshown in Fig. 3. F is a pipe which leads to saidvalve H from a tank, G,.of fluid under pressure-such as compressed airand which pipe F thencontinues to the expansible chamber E, and thence to the valve (ordamper) TEMPERATURE-REGULATOR.-

SPEGIFICATION fOZming part of Letters Patent No. 352,057, dated November2, 1886.

Serial No. 202,499. (No model.)

, operating device I. (Shown in detail in Fig.

2.) This latter device is identical with that shown in myapplication forpatent filed April 20, 1886, Serial No. 199,476, andconsists of a cuporcasingg, above which is a flexible ball.

h, having a vent, 13, at its base, formed .in a

nozzle, 1', which screws into a. bushing, 6 the edges of the rubber ballaround its perforation being held between the flanges of the nozzle andawasher On said bushing, and the said nozzle being dropped down througha hole in the bottom of the casinggand there joined to the pipe F, allas shown in said Fig. 2. Pressed against the ball h by means of thespring 3 is the cup 70, which bears the rod k, projecting up through thesupporting-frame B of the device I, which is secured in any .suitablemanner to the hot-air pipe B'- of the furnace B.

Fisthe damperjournaled in the pipe B, and

one of its journals, f projects through said pipe, and is extended to berigidly secured to one end of a slotted crank-arm, f, within whose slotthere works the bent upper end or crankpin, is", of the rod is, alreadydescribed.

My expansible chamber E, which'intersects the pipe F between the valve Hand damperoperating deviceI, has an upper rigid concave wall,e,(suitablysuspendedfrom the floor-beams ofthe apartment A,in thepresentill ustration,) and a lower flexible wall consisting of an expansiblediaphragm, e, preferably of cloth and rubber. Below this diaphragm is aconcavoconvex piece, J, (conforming in general shape to the concavity ofthe rigid wall e, just described,) and having a rigiddownwardly-projecting central stem, J, pivoted to a lever, L, which isfulcrumed in ahanger, K, depending from the housing or rigid wall of theexpansible chamber E. From one end, m, of this 1ever L there extends awire or cord, in, to the draft-door M of the furnace B, while from itsopposite end, a, there extends another wire or cord, n, to thecheck-doorNof said furnace. It is essential that the weight on the endit of the lever should be always greater than the weight on the end mofsaid lever, and to assist in securing this result a weight, 0, maybeused when necessary, as when the door M, for instance, should be heavierthan the door N.

The operation of my devices will be readily lOO understood from theforegoing description of their construction and arrangement.

In Fig. l. I sh ow theposition of the parts when the room is below thedesired temperature and the devices arranged in proper position topermit it to be heated. The compressed air in the tank G is shut offfrom the valve H, and the port h thereof being open, the compressed airwhich was in the expansible chamber E and pipe F on the other side ofthe said valve H has escaped through said port 71:", thereby allowingthe greater-weighted end 91. of the lever L to fall until thecheck-doorN is closed, this action serving to raise the other end, m, ofsaid lever, and with it the draftdoor M, while at the same time theescape of air from the ball 71. of the device I permits the spring j toexert its full downward pressure, carrying down the cup K and its rodis, thereby turning the damper F in the pipe B to a substantiallyvertical position, all of these parts being new as shown in Fig. 1, andthe heated air from the furnace being permitted to enter the apartment Athrough the register a. Now suppose the room becomes too warmthat is,heated to a greater degree than that to which the thermostat C isadjusted. The latter will expand and make contact with itscontact-screw, and thereby make the electric circuit by means of wires bc d,-whieh connect the battery D and valve H, and thus cause the armature-lever It to lift the piston valve H close the port h, and openthe passages h H It in said valve. This enables the compressed air inthe tank G to enter the pipe F, pass through the just-described passagesin the valve H,and fill the expansible chamber E, thereby forcing thepiece J, stein J, and that end of the lever L to which it is attacheddownward till the draft-door M is closed, (the consequent tilting of theother end of the lever at the same time opening the check-door,) and asthe compressed air fills the ball 71. of the device I the latter isexpanded, raising the cup k and its rod and closing the damper F in thepipe B, the valve H and part I and their attachments being new in thepositions shown in Figs. 2 and 3, and the hot air from furnace B beingthus shut off from the apartment A.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In a temperature-regulator, the combination of a thermostat situatedin the apartment whose heat is to be regulated, with a furnace providedwith a hot-air pipe leading to said apartment, and having draft andcheck doors connected to a lever operated by the contraction orexpansion of an expansible chamber, said lever, said expansible chamber,a reser voir of fluid under pressure, a pipe leading therefrom to theexpansible chamber, an electro-pneumatic valve located at a point onsaid. pipe intermediate between the said expansible chamber andsaidreservoir, an electric battery, and an electric circuit connectingsaid battery with the valve and thermostat, substantially as and for thepurpose set forth.

2. The combination, with the draft-doors of a furnace and the expansiblediaphragm-chamber, which operates said doors by means of a fluid underpressure, of an electrically-actuated valve governing the fluid underpressure, a thermostat and electric generator in circuit with saidvalve, and a reservoir for the fluid under pressure, whereby thethermostat will operate the electric valve, and thus admit the fluidunder pressure to and release it from the said expansiblediaphragm-chamber, thereby controlling the .drafts connected therewith,substantially as set forth.

3. In a heat-regulating apparatus, the combination of the followingco-operative parts: first, a valve controlling the heat which directlywarms an apartment, said valve being operated by afluid under pressure;second, an expansible chamber which operates by means of fluid-pressurethe drafts of a furnace supplying such heat; third, said fnrnace-drafts;fourth, an electrically'actuated valve which controls the fluid foroperating both said valve on the heating-pipe and said furnace-drafts;and, lastly, a thermostat, electric battery, and reservoir containingthe fluid under pressure, connected to said electrically-actuated valve,whereby the action of the thermostat controls the electric valve, and byits means, through the fluid under pressure, operates simultaneouslyboth the valve on the heating-pipe and the drafts of the furnace,substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the county of Milwaukee and State of Visconsin, in thepresence of two witnesses.

WARREN S. JOHNSON.

Witnesses:

H. G. Unnnnwoon, MAUnrcE F. Fame.

